wash your feet: In those ancient times, shoes such as ours, were not in use; and the foot was protected only with sandals or soles, fastened round the foot with straps. It was, therefore, not only necessary from motives of cleanliness, but also a very great refreshment, in so hot a country, to get the feet washed at the end of a day's journey; and this is the first thing that Abraham proposes. Genesis 19:2, Genesis 24:32, Genesis 43:24; 1 Samuel 25:41; Luke 7:44; John 13:5-15; 1 Timothy 5:10
tree: Rest in the shade was the second requisite for the refreshment of a weary traveller.